JP2013154685A - Vehicular air-conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner capable of suppressing leakage of the outside air from a second inside air inlet without providing any separate door or the like, and preventing invasion of foreign matter when sucking the inside air from the second inside air inlet.SOLUTION: A vehicular air-conditioner includes an inside-outside air switching case 21 having an outside air inlet 24 and a first inside air inlet 23, an inside-outside air switching door 22 for switching an outside air introducing mode for introducing the outside air and an inside air introducing mode for introducing the inside air, and a filter 40 which is arranged in the inside-outside air switching case 21, and allows the inside air and the outside air introduced in the inside-outside air switching case 21 to pass therethrough. A second inside air inlet 27 for introducing the inside air in the outside air introducing mode is formed in the inside-outside air switching case 21. The second inside air inlet 27 is arranged at the position where the inside air introduced from the second inside air inlet 27 passes the filter 40 without being mixed with the outside air introduced from the outside air inlet 24.

Description

  The present invention relates to a vehicle air conditioner.

  Conventionally, in order to improve the heating performance in the outside air introduction mode, an outside air introduction port for introducing outside air (vehicle compartment air) and a main first for introducing the inside air (vehicle compartment air) in the inside air introduction mode are provided. There is a vehicle air conditioner provided with a sub second inside air introduction port for introducing a part of inside air in an outside air introduction mode with respect to an air conditioning case having an inside air introduction port (see, for example, Patent Document 1).

  As a specific structure of such a vehicle air conditioner, in the air conditioning case, a second inside air introduction port is provided in a filter cover that closes the side wall on the upstream side of the filter and the insertion port of the filter. In some cases, a door or seat (hereinafter referred to as a door or the like) separate from the air conditioning case is attached (see, for example, Patent Document 1).

JP 2004-189059 A

  In the structure in which the second inside air introduction port is simply provided on the upstream side of the filter, when there is no door or the like in the second inside air introduction port, outside air is discharged from the second inside air introduction port when the vehicle speed is high or the outside air amount is large. Leaked into the passenger compartment, the passenger may feel uncomfortable. Therefore, in such a structure, a separate door or the like is attached as described above.

  However, a structure that attaches a separate door, etc. requires a separate door, etc. and parts for attachment, and requires a manufacturing process for attaching the separate door, etc. to the air conditioning case. It will increase. Therefore, it is desirable not to provide a separate door or the like in order to avoid an increase in manufacturing cost.

  Therefore, in order to suppress leakage of outside air from the second inside air introduction port without providing a separate door or the like, it is conceivable to provide the second inside air introduction port on the downstream side of the filter in the air conditioning case. According to this, in order for the outside air to reach the second inside air introduction port, it must pass through the filter once, so compared with a structure in which the second inside air introduction port is simply provided on the upstream side of the filter, Outside air is difficult to leak into the passenger compartment.

  However, in this structure, since the inside air introduced from the second inside air introduction port does not pass through the filter, there is a possibility that foreign matter sucked from the second inside air introduction port together with the inside air may enter after the fan.

  In view of the above points, the present invention can suppress leakage of outside air from the second inside air introduction port without providing a separate door or the like, and prevent entry of foreign matters when inhaling inside air from the second inside air introduction port. An object of the present invention is to provide a vehicle air conditioner that can be used.

In order to achieve the above object, in the invention according to claim 1, the air conditioning case (21) is provided with a second inside air introduction port (27) for introducing inside air during the outside air introduction mode,
The second inside air introduction port (27) is disposed at a position where the inside air introduced from the second inside air introduction port (27) passes through the filter (40) without being mixed with the outside air introduced from the outside air introduction port (24). It is characterized by having.

  The vehicle air conditioner of the present invention has a structure in which the outside air introduced from the outside air introduction port and the inside air introduced from the second inside air introduction port merge after passing through the filter in the outside air introduction mode. Therefore, according to the present invention, in order for the outside air introduced from the outside air introduction port to reach the second inside air introduction port, it is necessary to pass through the filter having a high pressure loss twice, and the filter becomes a resistance. Further, leakage of outside air from the second inside air inlet can be suppressed without providing a separate door or the like.

  In addition, according to the present invention, since the inside air introduced from the second inside air introduction port passes through the filter, it is possible to prevent intrusion of foreign matters when the inside air is sucked from the second inside air introduction port.

  In the invention according to claim 2, the air conditioning case (21) has a cover (213) that covers a part (42) on the upstream side of the air flow in the filter (40). 2 It is characterized in that an inside air inlet (27) is provided.

  In the invention according to claim 3, the air conditioning case (21) includes the first passage (51) through which the outside air flows from the outside air inlet (24) to the filter (40), and the second inside air inlet (27). A partition wall (214) is provided to partition the second passage (52) through which the inside air flows from the filter to the filter (40), and the second inside air introduction port (27) faces the second passage (52). It is characterized by being provided.

  In the invention described in claim 1, for example, the configuration described in claims 2 and 3 can be adopted.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a figure which shows the cross-sectional structure of the indoor air-conditioning unit of the vehicle air conditioner which concerns on 1st Embodiment. It is A arrow view in FIG. It is sectional drawing which shows the 2nd inside-air introduction opening vicinity in FIG. It is sectional drawing which shows the 2nd inside air inlet vicinity of the indoor air conditioning unit which concerns on 2nd Embodiment. It is sectional drawing which shows the 2nd inside air inlet vicinity of the indoor air conditioning unit which concerns on 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other will be described with the same reference numerals.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a view showing a cross-sectional configuration of an indoor air conditioning unit of a vehicle air conditioner according to the present embodiment, FIG. 2 is a view taken along arrow A in FIG. 1, and FIG. 3 is a second inside air introduction in FIG. It is sectional drawing which shows mouth vicinity. In addition, the up-down front-back direction in FIG. 1 has shown the front-back-up-down direction of the indoor air conditioning unit at the time of vehicle mounting.

  The vehicle air conditioner includes an indoor air conditioning unit 10. The indoor air-conditioning unit 10 is disposed inside the instrument panel (instrument panel) at the foremost part of the vehicle interior, and the air blower 30, a cooling heat exchanger (not shown), and heating heat are provided in the air-conditioning case 11 that forms the outer shell. It contains an exchange etc.

  The air-conditioning case 11 forms an air passage for vehicle interior blown air that is blown into the vehicle interior, and is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent strength. An inside / outside air switching device 20 that switches between introduction of inside air and outside air is disposed on the most upstream side of the air flow inside the vehicle interior in the air conditioning case 11.

  The inside / outside air switching device 20 includes an inside / outside air switching case 21 and a rotary door 22 disposed therein. The inside / outside air switching case 21 communicates with an air suction port 31a of a scroll casing 31, which will be described later, to form a passage for blown air. The inside / outside air switching case 21 and a scroll casing 31 described later are integrally coupled to form the air conditioning case 11. Further, in the inside / outside air switching case 21, a first inside air introduction port 23 is provided in the rear portion of the vehicle to introduce inside air, and an outside air introduction port 24 for introducing outside air is provided in the portion in front of the vehicle. Yes.

  The rotary door 22 is an inside / outside air switching door that continuously adjusts the opening areas of the first inside air introduction port 23 and the outside air introduction port 24 to change the air volume ratio between the inside air volume and the outside air volume. Door portion 22a and a sealing member 22b bonded to the end portion of the door portion 22a. The door portion 22a is made of resin, and the seal member 22b is made of rubber. By rotating the rotary door 22, the outside air introduction port 24 and the first inside air introduction port 23 are selectively opened and closed, and the outside air introduction mode for introducing outside air into the air conditioning case 11 and the inside air for introducing inside air into the air conditioning case 11. The introduction mode can be switched.

  A filter 40 that cleans the air introduced from the first inside air introduction port 23 and the outside air introduction port 24 is provided downstream of the first inside air introduction port 23 and the outside air introduction port 24 in the inside / outside air switching case 21. Has been placed.

  The filter 40 filters air passing therethrough, and a wave-shaped or mesh-shaped filter 40 main body is held in a rectangular tube-shaped frame. The filter 40 can be slidably inserted through a rectangular opening 25 formed in a side wall portion disposed on the vehicle interior side (vehicle rear side) of the inside / outside air switching case 21. On the inner wall surface of the inside / outside air switching case 21, a convex boss-like portion or a protruding rail-like portion (not shown) is provided so that the filter 40 can be slid into the opening 25 and can be held inside. The opening 25 is closed by a resin filter cover 26.

  Further, the inside / outside air switching case 21 is provided with a second inside air introduction port 27 for introducing a part of the inside air in the outside air introduction mode. The second inside air introduction port 27 is provided on the outside air introduction port 24 side (the vehicle front side) of the outside air introduction port 24 and the first inside air introduction port 23 and on the upstream side of the air flow from the filter 40.

  Specifically, in the inside / outside air switching case 21, the first side wall 211 located closer to the outside air introduction port 24 than the filter 40 is more inside and outside than the second side wall 212 facing the end surface (side) 41 of the filter 40. By being located inside the air switching case 21, the passage width on the upstream side of the air flow from the filter 40 is narrower than the passage width at the holding portion that holds the filter 40. In addition, the inside / outside air switching case 21 has a cover portion 213 that is connected between the first side wall portion 211 and the second side wall portion 212 and directly covers the peripheral edge 42 on the upstream side of the air flow of the filter 40. The cover portion 213 is located on the outside air introduction port 24 side (the vehicle front side) in the arrangement direction of the outside air introduction port 24 and the first inside air introduction port 23, and is parallel to the sliding direction of the filter 40. Adjacent. As shown in FIGS. 1 and 2, the cover portion 213 is provided with a second inside air inlet 27. Therefore, the second room air introduction port 27 is located immediately above the peripheral edge 42 of the filter 40. In FIG. 2, the second inside air inlet 27 is hatched.

  Since the second inside air introduction port 27 is arranged at such a position, the inside air introduced (inhaled) from the second inside air introduction port 27 is not mixed with the outside air introduced from the outside air introduction port 24. 40 is passed.

  A blower 30 that blows air introduced from the inside / outside air switching device 20 toward the passenger compartment is disposed on the downstream side of the air flow of the inside / outside air switching device 20. The blower 30 is housed in a scroll casing 31 that forms a spiral air passage. The blower 30 is an electric blower that drives a centrifugal multiblade fan (sirocco fan) 30a by an electric motor (not shown). The scroll casing 31 is formed with a bell mouth-shaped suction port 31a for sucking air.

  Although not shown, on the downstream side of the air flow of the blower 30, a heater core connected to the evaporator of the refrigeration cycle and the engine cooling water circuit as a cooling heat exchanger and a heating heat exchanger is provided in the vehicle interior air. The flow is arranged in this order.

  Further, on the upstream side or the downstream side of the air flow of the heater core, an air mix door for adjusting the temperature of air blown into the vehicle interior by adjusting the amount of air passing through the heater core and the amount of air bypassing the heater core (see FIG. (Not shown) is arranged.

  At the most downstream portion of the air flow of the air conditioning case 11, an air outlet is arranged for blowing the conditioned air whose blowout temperature is adjusted into the vehicle interior that is the space to be cooled. Specifically, as this air outlet, there are a face air outlet that blows air-conditioned air toward the upper body of the passenger in the vehicle interior, a foot air outlet that blows air-conditioned air toward the feet of the passenger, and the inner surface of the front window glass of the vehicle A defroster outlet (both not shown) is provided to blow air-conditioned air toward the front.

  Next, the operation of the vehicle air conditioner having the above-described configuration will be briefly described with reference to FIG.

  In the outside air introduction mode in which the rotary door 22 closes the first inside air introduction port 23 and opens the outside air introduction port 24, the outside air introduced from the outside air introduction port 24 passes through the filter 40 by driving the blower 30, and the suction port It is sucked into the scroll casing 31 from 31a. Then, the air blown out from the scroll casing 31 passes through the evaporator and the heater core, is temperature-adjusted, and is blown out from any one of the outlets into the vehicle interior.

  In this outside air introduction mode, inside air is introduced from the second inside air introduction port 27. The inside air introduced from the second inside air introduction port 27 is mixed with the outside air sucked into the scroll casing after passing through the filter 40. As described above, the inside air having a temperature higher than the outside air is mixed into the outside air, so that the temperature of the intake air sucked into the indoor air conditioning unit 10 is increased as compared with the case of only the outside air, so that the heating performance in the vehicle interior is improved.

  By the way, as described above, in the vehicle air conditioner of the present embodiment, the outside air introduced from the outside air introduction port 24 and the inside air introduced from the second inside air introduction port 27 merge after passing through the filter 40 in the outside air introduction mode. It is the thing of the structure to do.

  Therefore, according to the present embodiment, as shown in FIG. 3, in order for the outside air introduced from the outside air introduction port 24 to reach the second inside air introduction port 27, it passes through the filter 40 having a high pressure loss twice. Since the filter 40 becomes a resistor, leakage of the outside air from the second inside air inlet 27 can be suppressed without providing a separate door or the like.

  In addition, according to the present embodiment, since the inside air introduced from the second inside air introduction port 27 passes through the filter 40, it is possible to prevent foreign matter from entering when the inside air is sucked from the second inside air introduction port 27.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. In the present embodiment, the position of the second room air inlet 27 is changed with respect to the indoor air conditioning unit of the first embodiment. FIG. 4 is a cross-sectional view showing the vicinity of the second room air inlet of the indoor air conditioning unit according to the second embodiment.

  In the present embodiment, as shown in FIG. 4, a partition wall 214 is provided inside the inside / outside air switching case 21. By this partition wall 214, the first passage 51 through which the outside air flows from the outside air introduction port 24 to the position of the filter 40 and the second passage 52 through which the inside air flows from the second inside air introduction port 27 to the position of the filter 40 are separately provided. Is formed. The second inside air introduction port 27 is provided at a position facing the second passage 52 in the inside / outside air switching case 21.

  Also in the present embodiment, since the second inside air introduction port 27 is disposed at such a position, the inside air introduced from the second inside air introduction port 27 is introduced from the outside air introduction port 24 in the outside air introduction mode. It passes through the filter 40 without being mixed with the outside air. Therefore, also in this embodiment, there exists an effect similar to 1st Embodiment.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the position of the second room air inlet 27 is changed with respect to the indoor air conditioning unit of the first embodiment. FIG. 5 is a cross-sectional view showing the vicinity of the second room air inlet of the indoor air conditioning unit according to the third embodiment.

  In the present embodiment, the second inside air inlet 27 is provided in the second side wall portion 212 facing the side surface 41 of the filter 40 in the inside / outside air switching case 21. Further, as shown in FIG. 5, the filter 40 can also pass air from the side surface 41 of the filter 40.

  Also in the present embodiment, as in the first embodiment, since the second inside air introduction port 27 is arranged in a portion adjacent to the filter 40 in the inside / outside air switching case 21, the second inside air introduction mode 27 The inside air introduced from the inside air introduction port 27 passes through the filter 40 without being mixed with the outside air introduced from the outside air introduction port 24. Therefore, also in this embodiment, there exists an effect similar to 1st Embodiment.

(Other embodiments)
In each of the above-described embodiments, the rotary door 22 is used as the inside / outside air switching door, but a plate door may be used instead of the rotary door 22.

11 Air-conditioning case 21 Inside / outside air switching case (air-conditioning case)
213 Cover portion 214 Partition wall 22 Rotary door (inside / outside air switching door)
23 1st inside air introduction port 24 Outside air introduction port 27 2nd inside air introduction port 40 Filter 42 The peripheral part of the air flow upstream of a filter 51 1st channel | path 52 2nd channel | path

Claims (3)

An air conditioning case (21) having an outside air introduction port (24) for introducing outside air and a first inside air introduction port (23) for introducing inside air;
The outside air introduction port (24) and the first inside air introduction port (23) are selectively opened and closed to introduce the outside air into the air conditioning case (21) and the inside air to the air conditioning case (21). An inside / outside air switching door (22) for switching between the inside air introduction modes to be introduced;
A filter (40) disposed in the air conditioning case (21) and through which the inside air and the outside air introduced into the air conditioning case (21) pass,
The air conditioning case (21) is provided with a second inside air inlet (27) for introducing inside air during the outside air introduction mode,
At a position where the inside air introduced from the second inside air introduction port (27) passes through the filter (40) without being mixed with the outside air introduced from the outside air introduction port (24), the second inside air introduction port (27 ) Is arranged. The vehicle air conditioner characterized by the above-mentioned.   The air-conditioning case (21) has a cover part (213) that covers a part (42) on the upstream side of the air flow in the filter (40), and the second inside air inlet (27) is formed in the cover part (213). The vehicle air conditioner according to claim 1 is provided. The air conditioning case (21) includes a first passage (51) through which outside air flows from the outside air inlet (24) to the filter (40), and a second passage from the second inside air inlet (27) to the filter (40). A partition wall (214) is provided to partition the second passage (52) through which the inside air flows,
The vehicle air conditioner according to claim 1, wherein the second inside air introduction port (27) is provided at a position facing the second passage (52).

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